diff --git a/overlay_experimental/Renderer_Detector.cpp b/overlay_experimental/Renderer_Detector.cpp
index 251610c..997f146 100644
--- a/overlay_experimental/Renderer_Detector.cpp
+++ b/overlay_experimental/Renderer_Detector.cpp
@@ -25,6 +25,7 @@
 #include "System/String.hpp"
 #include "System/System.h"
 #include "System/Library.h"
+#include "System/ScopedLock.hpp"
 
 #if defined(WIN64) || defined(_WIN64) || defined(__MINGW64__) \
  || defined(WIN32) || defined(_WIN32) || defined(__MINGW32__)
@@ -77,10 +78,6 @@ public:
         delete vulkan_hook;
     }
 
-    bool force_stop_detection;
-    std::condition_variable detect_renderer_thread_cv;
-    std::mutex destroy_render_thread_mutex;
-
 private:
     Renderer_Detector():
         dxgi_hooked(false),
@@ -98,8 +95,7 @@ private:
         dx12_hook(nullptr),
         opengl_hook(nullptr),
         vulkan_hook(nullptr),
-        detection_done(false),
-        force_stop_detection(false)
+        detection_done(false)
     {
         std::wstring tmp(4096, L'\0');
         tmp.resize(GetSystemDirectoryW(&tmp[0], tmp.size()));
@@ -147,6 +143,8 @@ private:
     Vulkan_Hook* vulkan_hook;
     
     bool detection_done;
+    std::condition_variable stop_detection_cv;
+    std::mutex stop_detection_mutex;
 
     HWND dummyWindow = nullptr;
     std::wstring _WindowClassName;
@@ -431,14 +429,14 @@ private:
     }
 
     void HookDX9Present(IDirect3DDevice9* pDevice, bool ex, IDirect3DSwapChain9* pSwapChain,
-        decltype(&IDirect3DDevice9::Present)& pfnPresent,
-        decltype(&IDirect3DDevice9::Reset)& pfnReset,
-        decltype(&IDirect3DDevice9Ex::PresentEx)& pfnPresentEx,
-        decltype(&IDirect3DSwapChain9::Present)& pfnSwapChainPresent)
+        void*& pfnPresent,
+        void*& pfnReset,
+        void*& pfnPresentEx,
+        void*& pfnSwapChainPresent)
     {
         void** vTable = *reinterpret_cast<void***>(pDevice);
-        (void*&)pfnPresent   = vTable[(int)IDirect3DDevice9VTable::Present];
-        (void*&)pfnReset     = vTable[(int)IDirect3DDevice9VTable::Reset];
+        pfnPresent   = vTable[(int)IDirect3DDevice9VTable::Present];
+        pfnReset     = vTable[(int)IDirect3DDevice9VTable::Reset];
         
         (void*&)IDirect3DDevice9Present = vTable[(int)IDirect3DDevice9VTable::Present];
         
@@ -448,7 +446,7 @@ private:
         
         if (ex)
         {
-            (void*&)pfnPresentEx = vTable[(int)IDirect3DDevice9VTable::PresentEx];
+            pfnPresentEx = vTable[(int)IDirect3DDevice9VTable::PresentEx];
             (void*&)IDirect3DDevice9ExPresentEx = vTable[(int)IDirect3DDevice9VTable::PresentEx];
         
             detection_hooks.BeginHook();
@@ -463,9 +461,9 @@ private:
         
         if (pSwapChain != nullptr)
         {
-            IDirect3DSwapChain9VTable* vTable = *reinterpret_cast<IDirect3DSwapChain9VTable**>(pSwapChain);
-            pfnSwapChainPresent = vTable->pPresent;
-            IDirect3DSwapChain9Present = vTable->pPresent;
+            vTable = *reinterpret_cast<void***>(pSwapChain);
+            pfnSwapChainPresent = vTable[(int)IDirect3DSwapChain9VTable::Present];
+            (void*&)IDirect3DSwapChain9Present = vTable[(int)IDirect3DSwapChain9VTable::Present];
         
             detection_hooks.BeginHook();
             detection_hooks.HookFunc(std::pair<void**, void*>{ (void**)&IDirect3DSwapChain9Present, (void*)&MyDX9SwapChainPresent });
@@ -553,7 +551,7 @@ private:
                 decltype(&IDirect3DDevice9Ex::PresentEx) pfnPresentEx;
                 decltype(&IDirect3DSwapChain9::Present) pfnSwapChainPresent;
 
-                HookDX9Present(pDevice, Direct3DCreate9Ex != nullptr, pSwapChain, pfnPresent, pfnReset, pfnPresentEx, pfnSwapChainPresent);
+                HookDX9Present(pDevice, Direct3DCreate9Ex != nullptr, pSwapChain, (void*&)pfnPresent, (void*&)pfnReset, (void*&)pfnPresentEx, (void*&)pfnSwapChainPresent);
 
                 dx9_hook = DX9_Hook::Inst();
                 dx9_hook->LibraryName = library_path;
@@ -1045,7 +1043,10 @@ public:
             std::lock_guard<std::mutex> lk(renderer_mutex);
             if (detection_done)
             {
-                return renderer_hook;
+                if (renderer_hook != nullptr)
+                    return renderer_hook;
+
+                detection_done = false;
             }
 
             if (CreateHWND() == nullptr)
@@ -1069,8 +1070,9 @@ public:
         auto start_time = std::chrono::steady_clock::now();
         do
         {
-            std::unique_lock<std::mutex> lck(destroy_render_thread_mutex);
-            if (force_stop_detection) break;
+            std::unique_lock<std::mutex> lck(stop_detection_mutex);
+            if (detection_done)
+                break;
 
             for (auto const& library : libraries)
             {
@@ -1083,9 +1085,7 @@ public:
                 }
             }
 
-            detect_renderer_thread_cv.wait_for(lck, std::chrono::milliseconds(100));
-            if (force_stop_detection) break;
-
+            stop_detection_cv.wait_for(lck, std::chrono::milliseconds{ 100 });
         } while (!detection_done && (timeout.count() == -1 || (std::chrono::steady_clock::now() - start_time) <= timeout));
 
         {
@@ -1093,19 +1093,38 @@ public:
             DestroyHWND();
 
             detection_done = true;
+            detection_hooks.UnhookAll();
+
+            dxgi_hooked = false;
+            dxgi1_2_hooked = false;
+            dx12_hooked = false;
+            dx11_hooked = false;
+            dx10_hooked = false;
+            dx9_hooked = false;
+            opengl_hooked = false;
+            vulkan_hooked = false;
+
             delete dx9_hook   ; dx9_hook    = nullptr;
             delete dx10_hook  ; dx10_hook   = nullptr;
             delete dx11_hook  ; dx11_hook   = nullptr;
             delete dx12_hook  ; dx12_hook   = nullptr;
             delete opengl_hook; opengl_hook = nullptr;
             delete vulkan_hook; vulkan_hook = nullptr;
-            detection_hooks.UnhookAll();
         }
 
         SPDLOG_TRACE("Renderer detection done {}.", (void*)renderer_hook);
 
         return renderer_hook;
     }
+
+    void stop_detection()
+    {
+        {
+            System::scoped_lock lk(renderer_mutex, stop_detection_mutex);
+            detection_done = true;
+        }
+        stop_detection_cv.notify_all();
+    }
 };
 
 Renderer_Detector* Renderer_Detector::instance = nullptr;
@@ -1158,6 +1177,8 @@ private:
     OpenGLX_Hook* openglx_hook;
 
     bool detection_done;
+    std::condition_variable stop_detection_cv;
+    std::mutex stop_detection_mutex;
 
     static void MyglXSwapBuffers(Display* dpy, GLXDrawable drawable)
     {
@@ -1231,7 +1252,12 @@ public:
         {
             std::lock_guard<std::mutex> lk(renderer_mutex);
             if (detection_done)
-                return renderer_hook;
+            {
+                if (renderer_hook != nullptr)
+                    return renderer_hook;
+
+                detection_done = false;
+            }
         }
 
         SPDLOG_TRACE("Started renderer detection.");
@@ -1239,6 +1265,10 @@ public:
         auto start_time = std::chrono::steady_clock::now();
         do
         {
+            std::unique_lock<std::mutex> lck(stop_detection_mutex);
+            if (detection_done)
+                break;
+
             for (auto const& library : libraries)
             {
                 void* lib_handle = System::Library::GetLibraryHandle(library.first);
@@ -1249,12 +1279,18 @@ public:
                     (this->*library.second)(lib_path);
                 }
             }
-            std::this_thread::sleep_for(std::chrono::milliseconds{ 100 });
+            
+            stop_detection_cv.wait_for(lck, std::chrono::milliseconds{ 100 });
         } while (!detection_done && (timeout.count() == -1 || (std::chrono::steady_clock::now() - start_time) <= timeout));
 
         {
             std::lock_guard<std::mutex> lk(renderer_mutex);
+            
             detection_done = true;
+            detection_hooks.UnhookAll();
+
+            openglx_hooked = false;
+
             delete openglx_hook; openglx_hook = nullptr;
             //delete vulkan_hook; vulkan_hook = nullptr;
         }
@@ -1263,6 +1299,15 @@ public:
 
         return renderer_hook;
     }
+
+    void stop_detection()
+    {
+        {
+            System::scoped_lock lk(renderer_mutex, stop_detection_mutex);
+            detection_done = true;
+        }
+        stop_detection_cv.notify_all();
+    }
 };
 
 Renderer_Detector* Renderer_Detector::instance = nullptr;
@@ -1311,6 +1356,8 @@ private:
    OpenGL_Hook* opengl_hook;
 
    bool detection_done;
+   std::condition_variable stop_detection_cv;
+   std::mutex stop_detection_mutex;
 
    static int64_t MyCGLFlushDrawable(CGLDrawable_t* glDrawable)
    {
@@ -1384,7 +1431,12 @@ public:
        {
            std::lock_guard<std::mutex> lk(renderer_mutex);
            if (detection_done)
-               return renderer_hook;
+           {
+               if (renderer_hook != nullptr)
+                   return renderer_hook;
+
+               detection_done = false;
+           }
        }
 
        SPDLOG_TRACE("Started renderer detection.");
@@ -1392,6 +1444,10 @@ public:
        auto start_time = std::chrono::steady_clock::now();
        do
        {
+           std::unique_lock<std::mutex> lck(stop_detection_mutex);
+           if (detection_done)
+               break;
+
            for (auto const& library : libraries)
            {
                void* lib_handle = System::Library::GetLibraryHandle(library.first);
@@ -1402,12 +1458,18 @@ public:
                    (this->*library.second)(lib_path);
                }
            }
-           std::this_thread::sleep_for(std::chrono::milliseconds{ 100 });
+           
+           stop_detection_cv.wait_for(lck, std::chrono::milliseconds{ 100 });
        } while (!detection_done && (timeout.count() == -1 || (std::chrono::steady_clock::now() - start_time) <= timeout));
 
        {
            std::lock_guard<std::mutex> lk(renderer_mutex);
+           
            detection_done = true;
+           detection_hooks.UnhookAll();
+
+           opengl_hooked = false;
+
            delete opengl_hook; opengl_hook = nullptr;
            //delete vulkan_hook; vulkan_hook = nullptr;
        }
@@ -1416,21 +1478,31 @@ public:
 
        return renderer_hook;
    }
+
+   void stop_detection()
+   {
+       {
+           System::scoped_lock lk(renderer_mutex, stop_detection_mutex);
+           detection_done = true;
+        }
+       stop_detection_cv.notify_all();
+    }
 };
 
 Renderer_Detector* Renderer_Detector::instance = nullptr;
 
 #endif
 
-std::future<Renderer_Hook*> detect_renderer(std::chrono::milliseconds timeout)
+namespace ingame_overlay {
+
+std::future<Renderer_Hook*> DetectRenderer(std::chrono::milliseconds timeout)
 {
     return std::async(std::launch::async, &Renderer_Detector::detect_renderer, Renderer_Detector::Inst(), timeout);
 }
 
-void stop_renderer_detector()
+void StopRendererDetection()
 {
-    Renderer_Detector::Inst()->destroy_render_thread_mutex.lock();
-    Renderer_Detector::Inst()->force_stop_detection = true;
-    Renderer_Detector::Inst()->destroy_render_thread_mutex.unlock();
-    Renderer_Detector::Inst()->detect_renderer_thread_cv.notify_all();
+    Renderer_Detector::Inst()->stop_detection();
 }
+
+}
\ No newline at end of file
diff --git a/overlay_experimental/Renderer_Detector.h b/overlay_experimental/Renderer_Detector.h
index 190db07..d51d135 100644
--- a/overlay_experimental/Renderer_Detector.h
+++ b/overlay_experimental/Renderer_Detector.h
@@ -27,5 +27,9 @@
 
 #include "Renderer_Hook.h"
 
-std::future<Renderer_Hook*> detect_renderer(std::chrono::milliseconds timeout = std::chrono::milliseconds{-1});
-void stop_renderer_detector();
+namespace ingame_overlay {
+
+std::future<Renderer_Hook*> DetectRenderer(std::chrono::milliseconds timeout = std::chrono::milliseconds{ -1 });
+void StopRendererDetection();
+
+}
\ No newline at end of file
diff --git a/overlay_experimental/linux/OpenGLX_Hook.cpp b/overlay_experimental/linux/OpenGLX_Hook.cpp
index 25a07a4..5c71c7f 100644
--- a/overlay_experimental/linux/OpenGLX_Hook.cpp
+++ b/overlay_experimental/linux/OpenGLX_Hook.cpp
@@ -110,6 +110,8 @@ void OpenGLX_Hook::_PrepareForOverlay(Display* display, GLXDrawable drawable)
 
         _Display = display;
 
+        X11_Hook::Inst()->SetInitialWindowSize(_Display, (Window)drawable);
+
         _Initialized = true;
         OverlayHookReady(true);
     }
diff --git a/overlay_experimental/linux/X11_Hook.cpp b/overlay_experimental/linux/X11_Hook.cpp
index ebe4d01..562b735 100644
--- a/overlay_experimental/linux/X11_Hook.cpp
+++ b/overlay_experimental/linux/X11_Hook.cpp
@@ -83,6 +83,18 @@ void X11_Hook::ResetRenderState()
     }
 }
 
+void X11_Hook::SetInitialWindowSize(Display* display, Window wnd)
+{
+    unsigned int width, height;
+    Window unused_window;
+    int unused_int;
+    unsigned int unused_unsigned_int;
+
+    XGetGeometry(display, wnd, &unused_window, &unused_int, &unused_int, &width, &height, &unused_unsigned_int, &unused_unsigned_int);
+
+    ImGui::GetIO().DisplaySize = ImVec2((float)width, (float)height);
+}
+
 bool X11_Hook::PrepareForOverlay(Display *display, Window wnd)
 {
     if(!_Hooked)
diff --git a/overlay_experimental/linux/X11_Hook.h b/overlay_experimental/linux/X11_Hook.h
index 4ecb696..f1f5339 100644
--- a/overlay_experimental/linux/X11_Hook.h
+++ b/overlay_experimental/linux/X11_Hook.h
@@ -60,6 +60,7 @@ public:
     virtual ~X11_Hook();
 
     void ResetRenderState();
+    void SetInitialWindowSize(Display* display, Window wnd);
     bool PrepareForOverlay(Display *display, Window wnd);
 
     Window GetGameWnd() const{ return _GameWnd; }
diff --git a/overlay_experimental/steam_overlay.cpp b/overlay_experimental/steam_overlay.cpp
index d94de61..df61f65 100644
--- a/overlay_experimental/steam_overlay.cpp
+++ b/overlay_experimental/steam_overlay.cpp
@@ -196,14 +196,14 @@ void Steam_Overlay::SetupOverlay()
     if (!setup_overlay_called)
     {
         setup_overlay_called = true;
-        future_renderer = detect_renderer();
+        future_renderer = ingame_overlay::DetectRenderer();
     }
 }
 
 
 void Steam_Overlay::UnSetupOverlay()
 {
-    stop_renderer_detector();
+    ingame_overlay::StopRendererDetection();
     if (!Ready() && future_renderer.valid()) {
         if (future_renderer.wait_for(std::chrono::milliseconds{500}) ==  std::future_status::ready) {
             future_renderer.get();
diff --git a/overlay_experimental/windows/DX10_Hook.cpp b/overlay_experimental/windows/DX10_Hook.cpp
index 1553b80..55ff7b6 100644
--- a/overlay_experimental/windows/DX10_Hook.cpp
+++ b/overlay_experimental/windows/DX10_Hook.cpp
@@ -82,7 +82,7 @@ void DX10_Hook::_ResetRenderState()
         OverlayHookReady(false);
 
         ImGui_ImplDX10_Shutdown();
-        Windows_Hook::Inst()->_ResetRenderState();
+        Windows_Hook::Inst()->ResetRenderState();
         ImGui::DestroyContext();
 
         SafeRelease(mainRenderTargetView);
@@ -118,11 +118,13 @@ void DX10_Hook::_PrepareForOverlay(IDXGISwapChain* pSwapChain)
         ImGui::CreateContext();
         ImGui_ImplDX10_Init(pDevice);
 
+        Windows_Hook::Inst()->SetInitialWindowSize(desc.OutputWindow);
+
         _Initialized = true;
         OverlayHookReady(true);
     }
 
-    if (ImGui_ImplDX10_NewFrame() && Windows_Hook::Inst()->_PrepareForOverlay(desc.OutputWindow))
+    if (ImGui_ImplDX10_NewFrame() && Windows_Hook::Inst()->PrepareForOverlay(desc.OutputWindow))
     {
         ImGui::NewFrame();
 
diff --git a/overlay_experimental/windows/DX11_Hook.cpp b/overlay_experimental/windows/DX11_Hook.cpp
index e8231b9..d34524a 100644
--- a/overlay_experimental/windows/DX11_Hook.cpp
+++ b/overlay_experimental/windows/DX11_Hook.cpp
@@ -92,7 +92,7 @@ void DX11_Hook::_ResetRenderState()
         OverlayHookReady(false);
 
         ImGui_ImplDX11_Shutdown();
-        Windows_Hook::Inst()->_ResetRenderState();
+        Windows_Hook::Inst()->ResetRenderState();
         //ImGui::DestroyContext();
 
         SafeRelease(mainRenderTargetView);
@@ -151,11 +151,13 @@ void DX11_Hook::_PrepareForOverlay(IDXGISwapChain* pSwapChain)
         
         ImGui_ImplDX11_Init(pDevice, pContext);
         
+        Windows_Hook::Inst()->SetInitialWindowSize(desc.OutputWindow);
+
         _Initialized = true;
         OverlayHookReady(true);
     }
 
-    if (ImGui_ImplDX11_NewFrame() && Windows_Hook::Inst()->_PrepareForOverlay(desc.OutputWindow))
+    if (ImGui_ImplDX11_NewFrame() && Windows_Hook::Inst()->PrepareForOverlay(desc.OutputWindow))
     {
         ImGui::NewFrame();
     
diff --git a/overlay_experimental/windows/DX12_Hook.cpp b/overlay_experimental/windows/DX12_Hook.cpp
index afef09d..90e8918 100644
--- a/overlay_experimental/windows/DX12_Hook.cpp
+++ b/overlay_experimental/windows/DX12_Hook.cpp
@@ -137,7 +137,7 @@ void DX12_Hook::_ResetRenderState()
         OverlayHookReady(false);
 
         ImGui_ImplDX12_Shutdown();
-        Windows_Hook::Inst()->_ResetRenderState();
+        Windows_Hook::Inst()->ResetRenderState();
         ImGui::DestroyContext();
 
         OverlayFrames.clear();
@@ -271,11 +271,13 @@ void DX12_Hook::_PrepareForOverlay(IDXGISwapChain* pSwapChain, ID3D12CommandQueu
 			//heaps.cpu_handle,
             //heaps.gpu_handle);
         
+        Windows_Hook::Inst()->SetInitialWindowSize(sc_desc.OutputWindow);
+
         _Initialized = true;
         OverlayHookReady(true);
     }
 
-    if (ImGui_ImplDX12_NewFrame() && Windows_Hook::Inst()->_PrepareForOverlay(sc_desc.OutputWindow))
+    if (ImGui_ImplDX12_NewFrame() && Windows_Hook::Inst()->PrepareForOverlay(sc_desc.OutputWindow))
     {
         ImGui::NewFrame();
 
diff --git a/overlay_experimental/windows/DX9_Hook.cpp b/overlay_experimental/windows/DX9_Hook.cpp
index bbc6a31..5bdfb6c 100644
--- a/overlay_experimental/windows/DX9_Hook.cpp
+++ b/overlay_experimental/windows/DX9_Hook.cpp
@@ -88,7 +88,7 @@ void DX9_Hook::_ResetRenderState()
         OverlayHookReady(false);
 
         ImGui_ImplDX9_Shutdown();
-        Windows_Hook::Inst()->_ResetRenderState();
+        Windows_Hook::Inst()->ResetRenderState();
         ImGui::DestroyContext();
 
         SafeRelease(_pDevice);
@@ -137,11 +137,14 @@ void DX9_Hook::_PrepareForOverlay(IDirect3DDevice9 *pDevice, HWND destWindow)
         ImGui_ImplDX9_Init(pDevice);
 
         _LastWindow = destWindow;
+
+        Windows_Hook::Inst()->SetInitialWindowSize(destWindow);
+
         _Initialized = true;
         OverlayHookReady(true);
     }
 
-    if (ImGui_ImplDX9_NewFrame() && Windows_Hook::Inst()->_PrepareForOverlay(destWindow))
+    if (ImGui_ImplDX9_NewFrame() && Windows_Hook::Inst()->PrepareForOverlay(destWindow))
     {
         ImGui::NewFrame();
 
diff --git a/overlay_experimental/windows/DirectX_VTables.h b/overlay_experimental/windows/DirectX_VTables.h
index 6a85c75..c4aaf31 100644
--- a/overlay_experimental/windows/DirectX_VTables.h
+++ b/overlay_experimental/windows/DirectX_VTables.h
@@ -464,43 +464,24 @@ enum class IDirect3DDevice9VTable
     GetDisplayModeEx,
 };
 
-struct IDirect3DSwapChain9VTable
+enum class IDirect3DSwapChain9VTable
 {
-    enum class Index
-    {
-        // IUnknown
-        QueryInterface,
-        AddRef,
-        Release,
+    // IUnknown
+    QueryInterface,
+    AddRef,
+    Release,
 
-        // IDirect3DSwapChain9
-        Present,
-        GetFrontBufferData,
-        GetBackBuffer,
-        GetRasterStatus,
-        GetDisplayMode,
-        GetDevice,
-        GetPresentParameters,
+    // IDirect3DSwapChain9
+    Present,
+    GetFrontBufferData,
+    GetBackBuffer,
+    GetRasterStatus,
+    GetDisplayMode,
+    GetDevice,
+    GetPresentParameters,
 
-        // IDirect3DSwapChain9Ex
-        GetLastPresentCount,
-        GetPresentStats,
-        GetDisplayModeEx,
-    };
-
-    decltype(&IDirect3DSwapChain9::QueryInterface)        pQueryInterface;
-    decltype(&IDirect3DSwapChain9::AddRef)                pAddRef;
-    decltype(&IDirect3DSwapChain9::Release)               pRelease;
-
-    decltype(&IDirect3DSwapChain9::Present)               pPresent;
-    decltype(&IDirect3DSwapChain9::GetFrontBufferData)    pGetFrontBufferData;
-    decltype(&IDirect3DSwapChain9::GetBackBuffer)         pGetBackBuffer;
-    decltype(&IDirect3DSwapChain9::GetRasterStatus)       pGetRasterStatus;
-    decltype(&IDirect3DSwapChain9::GetDisplayMode)        pGetDisplayMode;
-    decltype(&IDirect3DSwapChain9::GetDevice)             pGetDevice;
-    decltype(&IDirect3DSwapChain9::GetPresentParameters)  pGetPresentParameters;
-
-    decltype(&IDirect3DSwapChain9Ex::GetLastPresentCount) pGetLastPresentCount;
-    decltype(&IDirect3DSwapChain9Ex::GetPresentStats)     pGetPresentStats;
-    decltype(&IDirect3DSwapChain9Ex::GetDisplayModeEx)    pGetDisplayModeEx;
+    // IDirect3DSwapChain9Ex
+    GetLastPresentCount,
+    GetPresentStats,
+    GetDisplayModeEx,
 };
\ No newline at end of file
diff --git a/overlay_experimental/windows/OpenGL_Hook.cpp b/overlay_experimental/windows/OpenGL_Hook.cpp
index 80993e3..b2c0085 100644
--- a/overlay_experimental/windows/OpenGL_Hook.cpp
+++ b/overlay_experimental/windows/OpenGL_Hook.cpp
@@ -68,10 +68,10 @@ void OpenGL_Hook::_ResetRenderState()
         OverlayHookReady(false);
 
         ImGui_ImplOpenGL3_Shutdown();
-        Windows_Hook::Inst()->_ResetRenderState();
+        Windows_Hook::Inst()->ResetRenderState();
         ImGui::DestroyContext();
 
-        last_window = nullptr;
+        _LastWindow = nullptr;
         _Initialized = false;
     }
 }
@@ -81,7 +81,7 @@ void OpenGL_Hook::_PrepareForOverlay(HDC hDC)
 {
     HWND hWnd = WindowFromDC(hDC);
 
-    if (hWnd != last_window)
+    if (hWnd != _LastWindow)
         _ResetRenderState();
 
     if (!_Initialized)
@@ -89,12 +89,15 @@ void OpenGL_Hook::_PrepareForOverlay(HDC hDC)
         ImGui::CreateContext();
         ImGui_ImplOpenGL3_Init();
 
-        last_window = hWnd;
+        _LastWindow = hWnd;
+
+        Windows_Hook::Inst()->SetInitialWindowSize(hWnd);
+
         _Initialized = true;
         OverlayHookReady(true);
     }
 
-    if (ImGui_ImplOpenGL3_NewFrame() && Windows_Hook::Inst()->_PrepareForOverlay(hWnd))
+    if (ImGui_ImplOpenGL3_NewFrame() && Windows_Hook::Inst()->PrepareForOverlay(hWnd))
     {
         ImGui::NewFrame();
 
@@ -117,7 +120,7 @@ OpenGL_Hook::OpenGL_Hook():
     _Hooked(false),
     _WindowsHooked(false),
     _Initialized(false),
-    last_window(nullptr),
+    _LastWindow(nullptr),
     wglSwapBuffers(nullptr)
 {
 }
diff --git a/overlay_experimental/windows/OpenGL_Hook.h b/overlay_experimental/windows/OpenGL_Hook.h
index 7dbf8d3..bffe6ba 100644
--- a/overlay_experimental/windows/OpenGL_Hook.h
+++ b/overlay_experimental/windows/OpenGL_Hook.h
@@ -37,7 +37,7 @@ private:
     bool _Hooked;
     bool _WindowsHooked;
     bool _Initialized;
-    HWND last_window;
+    HWND _LastWindow;
     std::set<std::shared_ptr<uint64_t>> _ImageResources;
 
     // Functions
diff --git a/overlay_experimental/windows/Windows_Hook.cpp b/overlay_experimental/windows/Windows_Hook.cpp
index 62eeef2..149e9da 100644
--- a/overlay_experimental/windows/Windows_Hook.cpp
+++ b/overlay_experimental/windows/Windows_Hook.cpp
@@ -88,7 +88,7 @@ bool Windows_Hook::StartHook(std::function<bool(bool)>& _key_combination_callbac
     return true;
 }
 
-void Windows_Hook::_ResetRenderState()
+void Windows_Hook::ResetRenderState()
 {
     if (_Initialized)
     {
@@ -100,10 +100,17 @@ void Windows_Hook::_ResetRenderState()
     }
 }
 
-bool Windows_Hook::_PrepareForOverlay(HWND hWnd)
+void Windows_Hook::SetInitialWindowSize(HWND hWnd)
+{
+    RECT rect = { 0, 0, 0, 0 };
+    ::GetClientRect(hWnd, &rect);
+    ImGui::GetIO().DisplaySize = ImVec2((float)(rect.right - rect.left), (float)(rect.bottom - rect.top));
+}
+
+bool Windows_Hook::PrepareForOverlay(HWND hWnd)
 {
     if (_GameHwnd != hWnd)
-        _ResetRenderState();
+        ResetRenderState();
 
     if (!_Initialized)
     {
@@ -374,7 +381,7 @@ Windows_Hook::~Windows_Hook()
 {
     SPDLOG_INFO("Windows Hook removed");
 
-    _ResetRenderState();
+    ResetRenderState();
 
     _inst = nullptr;
 }
diff --git a/overlay_experimental/windows/Windows_Hook.h b/overlay_experimental/windows/Windows_Hook.h
index 05eecf7..635d5db 100644
--- a/overlay_experimental/windows/Windows_Hook.h
+++ b/overlay_experimental/windows/Windows_Hook.h
@@ -68,8 +68,9 @@ public:
 
     virtual ~Windows_Hook();
 
-    void _ResetRenderState();
-    bool _PrepareForOverlay(HWND hWnd);
+    void ResetRenderState();
+    void SetInitialWindowSize(HWND hWnd);
+    bool PrepareForOverlay(HWND hWnd);
 
     HWND GetGameHwnd() const;
     WNDPROC GetGameWndProc() const;